python

f = open('d:/python.txt', 'w')for i in range(10000, 9999999):    f.write(str(i)+'\n')f.close()

java

public static void main(String[] args) {        int start = 10000;        int end = 999999;        int period = 10000;        String tmp = "";        String file = "d:/java.txt";        FileWriter fw = null;        try {            fw = new FileWriter(file);            for (int i = start; i < end; i++) {                tmp += i + "\n";                if (i % period == 0) {                    // 写文件                    fw.write(tmp);                    tmp = "";                }            }        } catch (IOException e) {            e.printStackTrace();        } finally {            if (fw != null) {                try {                    fw.close();                } catch (IOException e) {                    e.printStackTrace();                }            }        }    }